Reznor VPT Unit Installation Manual - Manual (Page 31)

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4.3 Burner Removal
Step 1: Isolate power and gas supplies.
Step 2: Disconnect the external power/control
connections.
Step 3: Detach the gas supply as shown
below, taking care to support the burner
connection.
Step 4: If ducted air is connected, slacken
hose clip and remove the flexible hose from the
burner.
Step 5: Slacken the set screw on the burner
support casting to enable the burner to be
removed from the radiant tube.
Step 6: Remove the burner and position the
burner in a safe area to prevent the burner or
components attached to the burner from falling
to the ground.
4.4 Burner Gas Injector Servicing
Step 1a: Remove the 4 retaining screws, then
remove the burner support casting and gasket.
Step 1b: The burner head assembly can be
disconnected by separating the connectors of
the ignition lead assembly and removing the
earth lead and pressure switch silicon tube.
Step 2: The gas injector can be inspected and
replaced if contaminated or blocked.
When replacing the gas injector ensure
approved thread sealant is used.
Step 3: Reconnect ignition leads and silicone
tube to test nipple. Refit gasket and support
casting.